Dùng các từ sau: ALTHOUGH - IN SPITE OF - BECAUSE - BECAUSE OF

ALTHOUGH  -  IN SPITE OF  -  BECAUSE  -  BECAUSE OF
              EX: although it rained a lot,we enjoyed our holiday
   1a-.......................all our careful plans,a lot of things went wrong
    b-.......................we'd phoned everything carefully,a lot of things went wrong
  2a-I went home early.............................I was feeling unwell
    b-I went to work the next day................................I was still feeling unwell
  3a-She only accepted the job...............................the salary ,which was very high
    b-She accepted the job...............................the salary,which was rather low 
  4a-I managed to get to sleep................................there was a lot of noise
   b-I couldn't get to sleep..........................the noise